The Seagull GC-109 is the top of the Seagull medium format roster. Like the GC-107, this non-metered classically-styled twin-lens reflex camera is patterned in the time-honored design of older Yashicamats. Its lightweight simple design consists of a waist-level finder with pop-up magnifier, manual film crank advance and separate shutter speed and aperture levers.
The GC-109 has all the features of the GC-107 and includes a 4 element "picture taking lens" plus a shutter lock lever. The viewing lens is a 75mm f/2.8 lens made of 3 elements in 3 groups. The mechanical lens shutter design provides flash synchronization at all speeds up to 1/500 second and there is also Bulb exposure. This camera also features a cold flash shoe and PC terminal for external electronic flash connection.
NOTE: The GC-109 differs from the GC107 in two ways. First, the GC-109 has an improved four element lens. Second, the GC-109 aperture and shutter speed settings are set using two rotating dials - one on each side of the lens with the readings seen through a small window above the viewing lens. The GC107 uses two sliding levers - one on each side of the lens but does not have an available window for reading the chosen settings.